I presume it was supposed to be DOEt, not DOMe. None the less, I am going to try to answer this question by anticipating what I think your professor wants you to give, and not what is likely to be the product of the reaction. This is supposed to be a mixed Claisen condensation. The first step is formation of the enolate of the dideuteropropriophenone with formation of DOEt. The enolate adds to the ethyl ester which then eliminates ethoxide to give a beta-diketone. It is more acidic than any of the starting materials and therefore the ethoxide removes the last deuterium from the diketone to give its enolate.
After acidification, the protonation gives the diketone,
PhCOCH(Et)CO-cyclopentane, the other product is ethanol (B).
Because the reaction must be done by adding the ethoxide to the ester in order to suppress an aldol condensation of the ketone, some deuteration of the ester will also occur. Because this ester is not a particularly reactive ester, some aldol condensation is also likely to accompany the product.